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Scilab Help >> Control Systems - CACSD > Linear Analysis > Stability > show_margins

# show_margins

display gain and phase margin and associated crossover frequencies

### Syntax

show_margins(h) show_margins(h,'bode') show_margins(h,'nyquist')

### Arguments

- h
a SISO linear system (see :syslin).

### Description

Given a SISO linear system in continuous or discrete time,
`show_margins`

display gain and phase margin and
associated crossover frequencies on a bode (the defaut) or nyquist
representation of the frequency response of the system.

### Examples

//continuous case h=syslin('c',0.02909+0.11827*%s+0.12823*%s^2+0.35659*%s^3+0.256*%s^4+0.1*%s^5,.. 0.0409+0.1827*%s+1.28225*%s^2+3.1909*%s^3+2.56*%s^4+%s^5); show_margins(h) show_margins(h,'nyquist')

//discrete case h = syslin(0.1,0.01547+0.01599*%z ,%z^2-1.81*%z+0.9048) show_margins(h) show_margins(h,'nyquist')

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